sql_lab.py uses PyArrow API that was removed in pyarrow 12.0.0

[wjones127]

This:

superset/superset/sql_lab.py

Lines 362 to 367 in 7a55625

	data = (
	pa.default_serialization_context()
	.serialize(result_set.pa_table)
	.to_buffer()
	.to_pybytes()
	)

Should be replaced with

sink = pa.BufferOutputStream()
with pa.ipc.new_stream(sink, result_set.pa_table.schema) as writer:
    writer.write_table(result_set.pa_table)

data = sink.getvalue().to_pybytes()

Will likely need to update the deserialization code as well, where ever that is.

Issue reported on Arrow mailing list here: https://lists.apache.org/thread/93sj6hzgnzz3j0gt5sw0l8pxg6b546ho

[wjones127]

@robdiciuccio it looks like you implemented this in #8069, so you might be in the best position to update this. (I haven't yet worked on superset myself.) I'm happy to provide more guidance on the use of PyArrow if needed, though.

[EugeneTorap]

Hi @wjones127! Thanks for this issue!
@sebastianliebscher Can we prepare a PR for upgrading pyarrow to 12.0.0 and replace that sql lab code?